import os
from selenium import webdriver

desired_caps = {}
desired_caps['platformName'] = 'iOS'
desired_caps['platformVersion'] = '9.3'
desired_caps['deviceName'] = 'iPhone Simulator'
desired_caps['app'] = os.path.abspath('/Users/tian/Downloads/iOS/YunSuo.app')

wd = webdriver.Remote('http://127.0.0.1:4723/wd/hub', desired_caps)


Traceback (most recent call last):
  File "/Users/tian/Documents/Python/Test/learn-appium.py", line 13, in <module>
    wd = webdriver.Remote('http://127.0.0.1:4723/wd/hub', desired_caps)
  File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 92, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 179, in start_session
    response = self.execute(Command.NEW_SESSION, capabilities)
  File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "/usr/local/lib/python3.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: An unknown server-side error occurred while processing the command. Original error: Xcode version [object Object] is not yet supported

Appium-1.5.3 Xcode-8.2.1 Python-3.6.0